diff --git a/plugins/filters.js b/plugins/filters.js
index 98be524e..b320151c 100644
--- a/plugins/filters.js
+++ b/plugins/filters.js
@@ -59,6 +59,7 @@ export default ({ app, store }) => {
 
   Vue.filter('recurrentDetail', event => {
     const parent = event.parent
+    if (!parent.frequency || !parent.type) return
     const { frequency, type } = parent.recurrent
     let recurrent
     if (frequency === '1w' || frequency === '2w') {